Multiple cross-site request forgery (CSRF) vulnerabilities in Joomla! before 1.5 RC4 allow remote attackers to (1) add a Super Admin, (2) upload an extension containing arbitrary PHP code, and (3) modify the configuration as administrators via unspecified vectors.
http://www.securityfocus.com/bid/28111
http://www.securityfocus.com/archive/1/485676/100/0/threaded
http://www.mandriva.com/security/advisories?name=MDVSA-2008:060
http://www.joomla.org/content/view/4335/116/
http://securitytracker.com/id?1019145
http://securityreason.com/securityalert/3505